Roll-over mechanism for molding machines



Mar. f5, 1923.

GIL. GRIMES ROLL OVER MECHANISM FOR MOLDING MACHINES Filed Dc; 27,' 1920'5 sheets-sheet l Mar. 6, 1923. 1,447,301 G. L. GRIMES ROLL OVERMECHANISM FOR MOLDING MACHINES Filed Dec. 27, 1920 A5 sheets-sheet 2noauto/0 G. L- GRIMES R'OLLVER MECHANISM. FOR MOLDING MACHINES- Mar. 6,1923.

Filed De-c.

27,' 1920 5 sheets-sheet y5 Mar. 6, 1923. Y 1,447,301

- G. L. GRlMEs ROLL OVER MECHANISM FOR MOLDING MACHINES Filed Dec. 2'?,1920 5 sheets-Sheet 4 1,447,301 G. L. GRIMES ROLL OVER MEcHANsM FORMOLDING r/IACHINES Filed Deo. 27, 1920 5 sheets-'sheet 5 valve l),controlling' the delivery of air to said cylinder and the exhausttherefrom.

Q, is a valve adapted to control the delivery of air from an aircompression chamber (not shown) to the valves Q and l), The valve Qcontrols the delivery of air to the cylinder D, through the pipes R andl whereby the piston D may be actuated and the flask Supporting platformraised or lowered as described in the co-pending applica-- tion to whichreference has previously been made.

S, indicates ay treadle pivoted to the main frame of the machine,connected by a link S, to a bell-crank lever S2 pivoted in a bracketsecuredto the frame.

S3, is a locking bolt connected with the bell-crank lever adapted to beprojected into slots S4, S, provided in the oscillating frame to securethe frame against further move ment until released by the manualoperation of the treadle.

T, is a cylinder fitted with a piston T having a rod T2, adapted to beprojected under the foot treadle S, to secure the locking bolt S3 inlocked relation with the oscillatingl frame, upon air being admitted tothe cylinder T through the pipe U, in turn connected with the air valveQ.

T3 is a spring to return the piston T to its initial position uponshutting ofl" the supply of air to the cylinder. The treadle beingreleased, the locking bolt may then be withdrawn to admit the rotationof the oscillating frame.

Having indicated the several parts by reference letters the constructionand operation of the machine will be readily understood.

The flask havingl been jolted through the operation of the piston D tocompact the sand around the pattern the platform is then raised to clampthe follow boa rd to the flask,

as described in the application for patent before referred to. Theoscillating frame is then turned-over by the admission of air throughthe valve P, into the pipe N and thence to the bottomy of the cylinderlf; (the exhaust port above the piston being simultaneously opened) thepiston l and its rod I2 carrying the sheave J is thus forced upwardly,as the air above the piston is slowly exhausted, which act-ing tipon thecable M, rotates the pulley G audit-hereby turns-over theflask-supporting platform E, The platform E may then be raised throughthe operation of the piston Dreas described in the application beforereferred to, and the pattern withdrawn from the flask. Air is thenadmitted to the cylinder T thereby locking the bolt S3 to preventaccidental oscillation of the frame C.

The flask is now removed from the pressure-arm F, F, upon which itrests, and the oscillating frame reversed by the admission iaevgsci ofair into the upper end of the cylinder l, through the valve l? and pipeN, thereby forcing the piston l downwardly and causing the sheave J toact upon the cable L secured at its respective ends to the bracket K andto the pulley G. The pulley G and the oscillating` frame are thusrotated in a reverse direction to that previously de@ scribed, therebyreturning the flask supporting' platform to its initial position asshown in Figure 2, to receive another flask.

The oscillating` frame is locked in both positions of its movement bythe manually operated treadle bolt S3, in turn secured againstaccidental release by the rod T2 of the piston T, which upon beingoperated through the admission of air into the cylinder T, is projectedbeneathy the treadle to secure the latter against movement until againreleased.

Having' thus described my invention what I claim is: f

l. Tn a molding' machine, an oscillating flask supporting frame, meansadapted to oscillate said frame alternately in opposite directions,means for locking said frame at each end of its predetermined movementand means for locking said locking means against accidental release. Y

2. In a moldingl machine, an oscillating' flask supporting` frame, apulley adapted to os-l cillate said frame`v aA cylinder, a. pistonfitted with a piston rod, a sheave carried by the piston rod, means fordelivering compressed air to each end of said cylinder alternately toactuate the piston in opposite directions, a pair of cables respectivelyconnected with said pulley and with fixed members of the frame, wherebysaid cables are acted upon by the sheave through the operation of thepiston, that said pulley and frame may be alternately oscillated inopposite directions.

3. In a molding machine, a flask supporting' frame, having,- a trunnionjournaled in a bearing in the frame of the machine, a pulley adapted tooscillate said frame bolted 'to said trunnion, a. cylinder, a pistonlitted witha rod, a. sheave carried by the piston rod, means foralternately delivering' compressed air to each end of the cylinder,whereby the piston may be actuated in opposite directions, anidle-pulley, a pair of cables adapted to be acted upon by the sheavepulley and respectively connected with said tir-st named pulley and withfixed members of the fraise, one of said cables being also arried by theidle-pulley, whereby upon the piston oilaerating` in alternatedirections duc to admission of air to opposite ends of the cylinder saidflask supporting 'frame will be alternately oscillated in oppositedirections.

et. ln a molding machine, an oscillating flask supporting frame, meansadapted to oscillate said frame alternately in opposite directions, atreadle actuated bolt adapted to secure said oscillatinglask Suppertinginitial position, whereby the treadle inay be 10 frame upon reaching thelimit of its inovereleased tha-t the bolt-,may be Withdrawn. inen ineither direction, a cylinder, a pis- In testimony whereof, I sign thisspeci-- t0n having a. stein adapted to be projected cation in thepresence oftWoW'f/nesses. into the path of the treadle for actuating thebolt, whereby the bolt may' be locked Y v GEORGE LGRIMES' againstaccidental release, means for deliver-dl lVitnesses: ing ail' to thecylinder to aetuate the piston, S. E. THOMAS,

und means for returning the piston to its GEORGE H. LOVEQUEST.

